UOGML Dive Manual - University of Guam Marine Laboratory

analysis; personnel requirements; equipment marking and maintenance
requirements; dive station requirements.
b) DCB may choose to limit standard nitrox diver training to procedures applicable
to diving, and subsequently reserve training such as nitrox production methods,
oxygen cleaning, and dive station topics to divers requiring specialized
authorization in these areas.
8.3.2 Practical Training
The practical training portion will consist of a review of skills as stated for scuba
(Section 4.00), with additional training as follows:
a) Oxygen analysis of nitrox mixtures.
b) Determination of MOD, oxygen partial pressure exposure, and oxygen toxicity
time limits, for various nitrox mixtures at various depths.
c) Determination of nitrogen-based dive limits status by EAD method using air
dive tables, and/or using nitrox dive tables, as approved by the DCB.
d) Nitrox dive computer use may be included, as approved by the DCB.
8.3.3 Written Examination (based on classroom instruction and practical training)
Before authorization, the trainee should successfully pass a written examination
demonstrating knowledge of at least the following:
a) Function, care, use, and maintenance of equipment cleaned for nitrox use.
b) Physical and physiological considerations of nitrox diving (ex.: O2 and CO 2
toxicity).
c) Diving regulations and procedures as related to nitrox diving, either scuba or
surface-supplied (depending on intended mode).
d) Given the proper information, calculation of:
1. Equivalent air depth (EAD) for a given f0 2 and actual depth;
2. p02 exposure for a given f02 and depth;
3. Optimal nitrox mixture for a given p02 exposure limit and planned depth;
4. Maximum operational depth (MOD) for a given mix and p02 exposure
limit;
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